Table 2.
Demographic characteristics of participants.
| Baseline characteristics | Intervention, n=55 |
Control, n=44 |
Total, N=99 |
|
| Age, mean (SD) | 27.18 (4.98) | 28.25 (4.78) | 27.66 (4.90) | |
| Race/ethnicity, n (%) | ||||
| White | 32 (58.18) | 23 (52.27) | 55 (55.56) | |
| African American | 22 (40.00) | 18 (40.91) | 40 (40.40) | |
| Other | 1 (1.82) | 3 (6.82) | 4 (4.04) | |
| Educationa, n (%) | ||||
| 12th grade or less with no high school diploma | 17 (30.91) | 9 (20.45) | 26 (26.26) | |
| High school graduate or equivalent | 15 (27.27) | 11 (25.00) | 26 (26.26) | |
| Some college | 20 (36.36) | 10 (22.73) | 30 (30.30) | |
| Associates or higher | 3 (5.45) | 14 (31.82) | 17 (17.17) | |
| Employment status, n (%) | ||||
| Part time | 6 (10.91) | 7 (15.91) | 13 (13.13) | |
| Full time | 19 (34.55) | 15 (34.09) | 34 (34.34) | |
| Not at all | 30 (54.55) | 22 (50.00) | 52 (52.52) | |
| Household income in US $, n (%) | ||||
| ˂$15,000 | 22 (40.00) | 18 (40.91) | 40 (40.40) | |
| $15,001-$30,000 | 14 (25.45) | 13 (29.55) | 27 (27.27) | |
| $30,001-$47,099 | 8 (14.55) | 5 (11.36) | 13 (13.13) | |
| ≥$47,100 | 10 (18.18) | 7 (15.91) | 17 (17.17) | |
| Marital status, n (%) | ||||
| Single, never married | 26 (47.27) | 20 (45.45) | 46 (46.46) | |
| Living with significant other | 16 (29.09) | 12 (27.27) | 28 (28.28) | |
| Married | 11 (20.00) | 9 (20.45) | 20 (20.20) | |
| Divorced/separated, widowed | 2 (3.64) | 3 (6.82) | 5 (5.05) | |
| Gestational age (in weeks), mean (SD) | 22.15 (9.54) | 20.51 (10.49) | 21.42 (10.17) | |
| Mobile phone ownership, n (%) | 49 (89.09) | 42 (95.45) | 91 (91.92) | |
| Social media: Facebook user, n (%) | 49 (89.09) | 36 (81.82) | 85 (85.86) | |
| Texts per day, n (%) | 64.36 (113.61) | 115.73 (334.24) | 87.19 (238.31) | |
| Cigarettes per day at baseline, mean (SD) | 6.89 (4.86) | 6.69 (5.38) | 6.80 (5.07) | |
| FTCD (0-10), mean (SD) | 2.68 (2.15) | 2.68 (2.24) | 2.68 (2.17) | |
| Baseline self-efficacy (1-7), mean (SD) | 4.95 (1.74) | 4.59 (1.86) | 4.79 (1.79) | |
| Smoked an e-cig in the past 30 days, n (%) | 12 (21.82) | 6 (13.64) | 18 (18.18) | |
| Alcohol consumption in past 30 days (≥1 drink), n (%) | 5 (9.09) | 3 (6.82) | 8 (8.08) | |
aP<.01.